Healthy competition is important yes.
But the endgoal of any capitalist enterprise is to beat the competition until you control all production.
The endgame of capitalism for individual companies is to create a monopoly.
We long ago decided that wasn't ok, and created regulations to make sure that the capitalists didn't control the bottom line thst way.
Then we added other regulations, like the minimum wage.
Capitalism has pros and cons, the con being that powerful companies will lower their bottom line at the expense of others. Socialist ideals are meant to prevent the bottom from falling out, from companies deciding to pay pennies because they know laborers are desperate and have nowhere else to go.
Capitalism is a fire, a great source of production and energy, but if left unchecked, will burn the house down. Socialism is creating an engine around that fire and harnessing it.
Implementations of socialism aside, I think we all can think of at least one thing that is better paid for socially and should not have competition.