If a company accumulates capital, it becomes vulnerable to the principal agent problem, and coops are way more vulnerable here than centralized companies.

If a company doesn't accumulate capital, it doesn't scale in complexity. It can grow by having more people do more of the same things, but it can't move into markets that demand anything complex.

This seems hard to tease out from the fact that a) the majority of companies do not survive, b) the large, large majority of companies that do survive do not wind up being large or innovative, and c) there are far fewer coops than regular companies. If you assume equal chance of success between them, you’d still see vanishingly small numbers of large, innovative coops, because a small percentage of a small number is small.

Coops can definitely succeed and even dominate at large scales with some minimum government protections. The largest dairy producer in the world is a coop: https://en.wikipedia.org/wiki/Amul

Coops tend to have better aligned incentives for employees on every step of the ladder. They'll tend to be more conservative about R&D but ensure that money that's being spent is being productive for the continuing health of the company since instead of that budget being "corporate's money pile" it's your potential profit share.

I think there's also a tendency towards longer tenure and higher value employees due to the investment in the company's future being a sort of central tenant of their attractiveness.

Generally, yes. Also the gap between the employee and executive class is a lot smaller instead of unnaturally inflated like it is in most private equity companies.

A company need not be a single product, and working in a worker-owned cooperative need not be a lifetime commitment to a single firm (though cooperatives ideally will have less turnover than firms owned by capital separated from labor.)

No, it implies that you give workers the means to dictate the direction of the company. That is what workplace democracy does:

https://en.wikipedia.org/wiki/Workplace_democracy

Acting like centrally planned dictatorships is a good form of collaboration is just so off base. There's no reason to think that introducing democracy into the work place wouldn't immediately benefit both workers + customers.

If this sounds crazy the C suite + board already vote on who gets hired into the executive team, vote for the direction of the company, and vote for their compensation packages (hint, they never decrease them).

Why shouldn't workers be legally enabled to do the same? What is the justification to this? I'm curious to hear it because the only way people can justify the current system is declaring that some people are actually more deserving of prestige, money, and benefits while others deserve to suffer.

With income inequality increasing, healthcare outcomes worsening, and children literally becoming stupider isn't it time to question the current system and ask ourselves if this is the society we truly want?

Worker owned cooperatives have a variety of ways of doing this. Voting directly, electing people, etc. The main difference is that the cooperative typically doesn't buy the myth that the person making the high level decision needs to be paid 1000x the workers.

No, look at functioning democracies. They don't need authoritarian rulers, only those that want to be authoritarians argue elsewise.

Politics among the workers vs politics among the shareholders.