This answer from muru on another tag change/merge proposal posted around the same time is also relevant here, as the same reasoning is also applied to the
watch tag in their answer/reasoning:
I'm not in favour of this. The command names of
mvare sufficiently different from their actions (copy, move) that the
-commandsuffix is not needed to make it unambiguous. But this is not true for
cut, where an action has the same name as the command. This also holds for
watch. I do a fair bit of retag edits and I have seen plenty of people just use words in the question as tags, and this risks increasing misuses of cut-command or watch-command in questions that involve cutting or watching of some sort, but entirely unrelated to the commands themselves.