I may be full of crap...............
https://www.motorcycleproject.com/text/ignition_coils.html
That guy (Mike Nixon) was a Honda tech forever on DOHC and pretty much knows his stuff.
What I passed down in the response above was 'what I've picked up or heard', I have had no experience with spark unit damage directly, mine has much more been along the lines of what is posted in the above link, and I agree with the last note #3 in it. As in, aftermarket coils generally for sale are not spit. I for one tried out Accel coils at lower ohm and quite simply was not impressed with them, I then came up with the GM HEI coil/module setup with .5 ohm coils and the difference was quite striking back in the very early '80s, THAT one would fire plug gaps over twice as wide as the high falutin' Accels. I know for sure that using coils THAT low WILL eat the spark units, it was reported a bunch of times in the DOHC websites when guys did partial mods to only use the GM coils because they could get them from junkyards for pennies.
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=17189
YET, that info comes from the SAME guy who did the above link! So, what's it gonna be?
Welcome to Confusion City..................fun, huh?
I CAN tell you after lots of personal hands on with really big carb auto race engines that you can appear to have totally rejetted a carb simply by increasing spark voltage if it was badly needed, the carb could appear too rich and then suddenly the stronger spark makes it go lean. BTDT a hundred times, so that part is 100% true. Weak spark always makes the carb seem too rich, the intertwining there is hard linked. Why just really bumping spark up can clean idle quality up like you would not believe.