There is value in making things "more reproducible" even if you don't achieve "total reproducibility". Even just having a basic layer of extra isolation from the host system (even when updating everything at will without pinned versions) can be enough to motivate the tool's usage. There are varying degrees of reasonable pragmatism in different situations. Heck some people even decide not to use containers at all, and some of those even have well-motivated reasons for this choice!

(And will this stuff even still run on chips 10-20 years from now anyway? Is there maybe a practical limit to reproducibility?)