No i absolutely do not think people deliberately are trying to fraudulently claim pip.
However, I think resilience & grit are at an all time low. I think a lot people consider that they cannot do things if they find them hard, or upsetting, or if doing those things reduce their energy to do other things (such as hobbies outside work).
I believe you cannot do something if you literally cannot do it. For example, you cannot walk to the shops if you are paraplegic, or have a severe learning disability that means you can't remember where the shops are or read a map/instructions to get there.
You can walk to the shops if you have severe anxiety, however it might leave you drained and it may be a really unpleasant experience for you.
I think a lot of people with mental health conditions in particular genuinely feel utterly impaired, that cannot cope with any sort of job etc, who actually might feel better working & having purpose and self worth. Its a really difficult cycle to be trapped in.
So I don't think those people are fraudulently claiming pip, i just think fewer people overall should be eligible and it should be reserved for those most severely impaired.
I can't help but feel that the level of impairment at which someone can receive pip is set at a point which captures too great a proportion of the population.