That’s not a fair comparison, age matters, most people don’t get smarter or stronger when they grow old. More fair comparison would be “you can’t fight against a child”, some children are quite strong for their age, as Mike definitely is for his age, and some eager children would surely want to fight against a professional in his prime. But there’s no point for said professional to fight them apart from a show match, and you don’t destroy children or elders in a show match even of you can.