The problem is how do we get there? In a market there will always be actors powerful enough to corrupt the governmenta and influence regulation in an undemocratic way.
Even in a market dominated by socialist companies where workers have power. Workers having ownership isn't some panacea against corruption and willingness to dominate others. You can still end up with a company full of terrible people who have no qualms cornering a market and then committing to rent-extraction. They can even commit to those horrible practices in an internally democratic way!