If the touchbar works best for infrequently used actions then is it worth it to use so much of valuable keyboard real estate and sacrifice tactile feedback for infrequently used actions?

I think the touchbar is a cool idea and I loved that Apple explored it innovated. But I also think that ultimately it's not a good idea and good design. Particularly for the power users.

Those who use FCP, Logic X would beg to differ. It depends on use case, but not every power user is the same. Watch the video, look at their marketing, they're showing you who they think their pros are.

Are these industry pros just not talking about it? coz every review by any kind of pro i see on youtube talks about how worthless teh touch bar is as a con against a macbook

Then it has very limited value relative to its costs, one being function keys...