On a game level it makes no sense. On a developer level, it can certainly have an impact. Eg, the backlash against Beamdog altering the pre-existing content of Baldur's Gate certainly contributed to their decision to not do the same with subsequent re-released "EE" games (Icewind Dale, Planescape Torment & NWN).
DadJoke007: Steam might wanna do something about review bombing on their platform though since that sends a signal to other publishers and developers. However, such restrictions would end up with Valve/Steam being called fascists and/or commies by the same review bombing people.
Conversely, if they did "do something", you'd also quickly see developers themselves erecting all sorts of
"every cluster of valid negative reviews are 'really' unfair review bombs" straw-men to censor valid criticism and 'play' their own review scores upwards. Example -
"Don't bother buying X game from this dev. Aside from the fact this game has game-breaking bugs, the previous Y game in the series has been abandoned with still existing unfixed game-breaking bugs". Dev: "Help! We're the victim of hate! Please delete this unwelcome honesty, uh, I meant 'protect' us from 'review bombs' which 'unfairly' mention other games..."
Likewise for devs who want all the free publicity of a cheap sequel riding off the back of a pre-existing established franchise, yet simultaneously don't want the new dumbed down game to be judged vs old ones as to whether they fit into that franchise. Example -
"We the developers of Deus Ex: The Fall believe it's highly unfair for anyone to expect a Deus Ex game to be Deus Ex-ish and want all such reviews that mention any previously released Deus Ex game deleted". For all their faults, Steam have done the right thing in not allowing devs to control their own negative reviews under the guise of 'countering unfair review bombs' when more often than not, as the saying goes - "there's no smoke without fire"...