It’s a fair point. There’s some argument to investing in the back 7 and hoping they hold up enough for the front 4 to finish plays.
With how flag happy the NFL is, especially on the offense, not sure it’s the best strategy. But you could paint the LOB Seahawks with that brush. 3 All Pro DB’s, 1 All Pro LB, and a gaggle of okay to above average guys on the DL.
On topic, Walsh has my vote as the second best HC ever tbh. Changed the game and has the hardware to prove it.