Because a 93rd minute consolation in a defeat to Southampton or when 5-1 down to Spurs means absolutely nothing other than making numbers look better on a spreadsheet.
So the exact same applies to all those goals Lukaku scored in games we didn't win then.
It's a stupid argument.
If the performances aren't there - and they haven't been a fair bit - then fine. Have a dig. Don't have a dig for 'scoring goals'. It's like the poster that said "unfortunately Richarlison scores goals".