It sounds like you're just a "yessayer", though? Not much different from naysayers, just on the opposite side.

One thing that naysayers have going on for them is the fact that those companies indeed aren't making profit right now.

People get obsessed with wanting companies to profit ASAP.

That's not how you grab market share. Early on, any profit you aren't reinvesting into the business is basically hurting your growth rate.

What value has market share if switching costs are close to zero, and alternatives continue to be available?

Grabbing market share by making losses only helps if it actually wins you a genuine monopolistic market position.