No.
The SEC has more total NFL Talent, and better and more talented teams, but they also have their share of bad teams, bad players and bad coaches. Auburn had 3 games in a row where they passed for less than 100 yards, A&M had games where the QB was pressured half the time, and Arkansas & Vanderbilt had 1 conference win between them. Couple that with an 8 game schedule that includes teams playing each other once every 12 years, and the results are skewed towards the SEC.
In 2008, the B12 had 8 QB that played in the NFL, including all 6 from the B12 South (Colt, Bradford, Harrell, Griffin, Tannehill & Weeden). The B12 was the better league, they just didn't win the last game.
In 2022, Kelvin Banks went against 3 NFL 1st Round DE from the B12 (Tyree Wilson @ Tech, Will McDonald @ ISU, & Felix Anudike-Uzomah @KSU). There were 5 total (Iowa & Clemson), none from the SEC.
SEC better, yes, top to bottom since forever, no way.