Yea that's the way I've always done it.
And if I ever took my mower to a shop and seen them cleaning it with dental pick before they worked on it......Well need I say more....
I never ever ever put a ohm meter on a plug for checking condition of a plug. His video talked a lot about resistive spark plugs that's all well and good. But if it's just a cheapo mower plug there isn't much to check.
I always looked at the condition of the spark and went from there...
I'm not in the business anymore but never ever let the customer tell you that it's probably something simple and easy to fix..?
I could never understand if it was so simple WHY did you bring it here...??
Not sure what the manufacturers thinking is but I'm sure they make what's best for their particular mower ...They wouldn't put a so-so blade on if they know there's something even better to make their mower work better...
On a side note I went from Gator g3 blades which has about a 3" cutting...