

Disclaimer, I’m just a rando with a search habit. Not like, a professional analyst.
It’s maybe not the dumbest to use them in this way - their carrying capacity meant fewer sorties per pound of munition delivered.
But also, it seems like Russia is picking and choosing how it deploys resources, presumably so its more advanced jets do not have to be put at risk (there are various reasons for why that may be so - the linked article discusses them).
The other side of it is that keeping the strategic fleet demonstrably in use signals to other countries that Russia may be able to back up their nuclear saber-rattling.
I think Ukraine can only pull off a big attack like this a few times. Not because they’re incapable, or Russia, now aware of the method, can defend against it, but because each attack generates data. The more data you have, the greater the ability to analyze and spot patterns, which puts Ukrainian operators at risk.
Although it would be excellent if another attack happened very soon against another relatively irreplaceable Russian asset. But a campaign of smaller scale harassment throughout the country would suffice to harm morale and keep supply constraints, well, constrained.