Plenty of people do. Especially since broken mods can cause problems like unexpected crashes that might not be easy to trace back to the mod. If the game automatically sends in crash reports, a popular mod becoming unstable might generate significant work for a while.
A mod-aware game wil usuallyl point out right in the crash log that it’s modded and might even enumerate the mods. Makes it real easy to find out that “Jake’s Improved Graphics for 2.3 Continued” is the shared culprit.