All of those can be easily scaled though. They are all simply protected industries with entrenched incumbents weilding political power to maintain their status quo at the expense of everyone else. We could easily have 10x more doctors, houses, and quality educators if the artificial barriers to entry were lowered or removed.

That's irrelevant to the matter at hand. Scaling them has nothing to do with implementing UBI, and would be a good idea whether or not UBI is implemented. UBI simply does not solve the problem of poverty, or the poor having access to those goods and services.

Scaling them does have to do with UBI, because the argument above is that UBI would not work because the price of some goods and services will rise to compensate because they don't scale. If supply for these critical goods and services is instead increased alongside a progressive UBI deployment, then this wouldn't happen and we'd presumably in a better position afterwards.

When those are scaled, I'll gladly support UBI.

But then UBI won't be needed, as all these will be dirt cheap, like phones ($50 Motorola, not $1500 iPhone).

That doesn't make any sense at all. You need to do some thinking.