Yup, agree. The fighter/dive bomber requirement was decided upon back in 1933, long before any of the guys in the Air Ministry could have had any inkling of the impact that decision had. Nevertheless, before it even entered FAA service in 1937 the Air Ministry expressed its doubts about it, so that never helps, when the one responsible for the idea later thinks it's produced an inferior product because of it. Blackburn designed a fairly average aeroplane that did what it said on the tin; nothing more, and with a little bit less than what was expected, but as a dive bomber it certainly met the criteria and proved itself handy in a fight, again through the determination of the teams operating it rather than through any outstanding characteristics of the machine. It certainly did not introduce any capabilities that didn't exist elsewhere, on both sides of the coin, as an exemplary dive bomber and as a mediocre fighter.
The Fulmar was actually a good aeroplane that met the requirement and fulfilled what was expected of it. It was designed as a stop-gap and was meant to hold the line until something better came along - that that took longer than expected meant the Fulmar was around longer than expected. Nonetheless, it performed very well against the Luftwaffe and the RAI in the Med, where decent radar protocols and what have you were not available when operating from land bases, which the type did. So it is easy to miscast it purely because of its lower performance, but it was actually a good aircraft, just not the best fighter and certainly not what the navy needed out of a fighter at the time. Again, its crews made the type's name as an adequate fighter that in a good pilot's hands made it a handful even for single-seat fighters.