There’s a huge fucking difference between a 20 year old (giving DiCaprio 5 years with the individual before they turn 25) and a 14 year old. A 14 year old has only just developed the ability to think about matters in a non-binary (as in not purely bad or purely good for example) manner, a 20 year old has been able to think that way for nearly a decade. Ones decision making skills are decidedly very poor before about age 25 as the brain is still developing, and that development is still occuring at a breakneck pace at 14 where by 20 it’s slowed significantly. Even if you just look at the years that’s like saying an 8 year old is basically the same as a 14 year old which is obviously not the case.

Now, it’s definitely kinda weird for someone to go for a 20 year old in their 40s. Having a 25 year age gap between you and your partner is honestly some level of weird at any life stage, but at least by 20 they’re an adult legally and mentally. Anyone over the age of 20 is generally able to understand the risks and consequences of their actions, and while some amount of mistakes are understandable both due to poor decision-making skills and lack of life experiences, it’s nowhere near as drastic as a 14 year old left to their own devices