I can argue that it’s the other way around
1- having only one implementation made us get confused between what is consensus vs what is just an implementation spec. To a point that Core Devs can actually filter/control certain behaviors despite that not being in the consensus. Core is also somehow ruling what is going to be added even for future soft forks
2- with more implementations if one has a bug others will resist. Having only one implementation if there is a critical bug it’ll affect everybody
So I’m in favor of having more diversity of opinions and software is somehow an opinion here