Yes, but it’s up to their competitors to build competing services.
Until somewhere down the line. Like when half of Spain gets cut off due to an arbitrary block on a consolidated service facade...
They are advantageous to leverage in certain situations but essential they are not. We're used to, in the technology industry, looking for or creating problems to solve with services we are aware of. Moving back to necessity and need, do we really? Are we being objective? Most of the time, no.
We have antitrust regulations for such things.