For the time being, I don’t find it too bad if you use keyboard shortcuts. Especially if it’s a controversial ID I need to apply to tons of observations like pushing up a common CV error species and I expect some pushback. Usually I’ll type out the first few letters of the taxon name for the ID which leaves my clipboard free to Ctrl+V the ID comment text in. Once the text is written I can just copy and paste from previous IDs.
However if I had different texts for multiple taxa then a text expander browser extension would be the way to go. This custom iNat extension also incorporates ID comments.