Lenny Dykstra will decide for himself whether or not he will have sex with older women. Although I do not agree with this choice, he is not legally prohibited from doing so. One's opinion about whether or not he should have sex with older women does not change or prevent his having the ability to choose. Therefore, no one should care about Dykstra's willingness to have sex with older women.
Considering the fact that Lenny Dykstra is middle-aged, it is completely healthy and appropriate that he wants to sleep with older women. Furthermore, a person's sexual preferences are no one's business except his or her own unless they break law, e.g. child molestation or illegal prostitution. This obsession so many countries have with what goes on in the bedroom is deeply unhealthy, appallingly damaging, and incredibly peculiar.
I disagree that any person should care about the sex life of Lenny Dykstra. It is irrelevant to anyone else's life and unimportant in the long run. Why should anyone care? It doesn't mean anything to anyone but himself. People need to focus on their own lives and bettering themselves.
No, no one should care about Lenny Dykstra's willingness to have sex with older women. If he does, that is his personal preference and it is a meaningless one in the greater scheme of things. It also is likely that Dykstra said what he said about accepting money from the elderly to have sex with them simply for shock value and to inspire people to be interested in the memoir he just released.