Even if you don't care about that (and you should!), "you can't highlight text [without doing additional work that nobody will do because it wasn't an explicit KPI for them]" is itself really disappointing and bad.
The reasons to escape Flash are the performance and power-consumption issues, rather than accessibility.
If you take browser as a document viewer then accessibility is critical. However if you take browser as a universal application platform, then accessibility is not necessary, right?
We escaped Flash. We shouldn't clamor to go back.