I used to be 'against it', then when building folded horn subs 15-20 years ago, became reliant on EQ for LP and correction.
Now, I have a pair of much smaller sealed HSU ULS15's and still use EQ in a narrow way (pun intended)...
Even after treatment, I still have a bump in my frequency response at 2 room modes (45hz and 95hz) which I cut in Roon using 2 very narrow Q EQ filters, -6dB each at those frequencies. I add nowhere, just these 2 cuts.
Since you can flip the filters on/off in Roon from your iphone/ipad, it's easy to test and adjust. They definitely help cut both boom and decay and tighten up the response.