The kind of illnesses being described aren’t just faked. And if they were, he wouldn’t be hospitalised and other news were getting. Authorities have repeatedly blocked his colleagues and family members access. If he is in hospital, the same authorities would have deemed it very necessary.
Frankly, people were rather shamelessly saying the same thing when Kulsoom Nawaz was in poor health. ‘Fake, excuses, drama’ etc, and then she shortly passed away due to illness thereafter and the shameless bs subsided.
And if his objective was to simply escape, which I can say quite surely it probably isn’t his objective. Why did he even come back to be put on trail, jailed etc. He was in London and made a decision to return.
The only plausible argument left for you to make now is to say that perhaps he didn’t anticipate such harsh treatment and now feels like escaping. That is pure conjecture, but to this I have to say that he is an old man, and a former head of state. If the conditions he has been kept in are as bad as the stories say, then it’s a shameful way to treat a former PM.