Hmmmm.... Looks like another B&S Sprint motor that has never had an oil change, is low on oil and has never had the air filter cleaned, Naah won't happen!

Yeah, riiiiight... It's a bit sad, but consumer level mowers are just another throwaway appliance, these days. Just how it is...
The air cleaner servicing issue used to occur as far back as the 70's, FWIW. Our family dealership used to fit chrome ring sets to extend the motor's life somewhat, back then. Running the engine with a clogged air filter resulted in excessive bore wear, in aluminium bore engines.
Then after the tariff barriers were dropped by the Whitlam Govt, it became cheaper to fit a new short motor....