I get what you think, some people are natural born people pleasers, plus it's so bothersome to constantly hear other's thoughts 24/7, can you imagine that hell? Some people hear it as 'Ah that's a problem, it's bothersome, I should try to fix it/make that person better'. Some thoughts are fleeting, but the person who hears them may very well believe it in the moment and wish to help. I can relate to the MC, that's why. You'd get insecure if you constantly hear everyone's negative rambling.
Because the first words you’ll ever hear come from your own parents. You realise that babies can hear words in the womb right? That means he was hearing thoughts in the womb too and internalising it. When he was a baby, every “ugh I just fed him! Why he’s hungry again?” And every “god why does he always pee on me when I take off his diaper?” Gets internalised even if he doesn’t remember that time. Whenever he makes a mistake or does something naughty and gets told off for it, it gets internalised. Hearing someone scold you twice must be brutal (especially because his parents are honest people) and then you have school friends who you naturally really want to get along with (because humans are herding animals and both extroverts and introverts need social exposure to survive) so you end up becoming a tiny bit of a people pleaser. When someone hates on you for not doing something how they want you to do it and you’re at that fragile growing stage, it’s hard to not adopt it as your world view. Young children are sponges and that’s why offhand words that are said to young children can end up becoming lifelong trauma when they become adults. Being praised with “you’re so helpful! Thank you so much! You’re so much nicer than other boys your age!” And now equating “being helpful to others” with “validation” is actually really common and a lot of children hear that kind of thing. I used to get told by my parents and friends and cousins parents that they love me because I’m so helpful and I always take part in chores and I’m respectful to them. It shaped me and until a few years ago, I couldn’t understand why I felt so uncomfortable and antsy not doing anything for anyone even when I was alone. My therapist helped me understand it’s not my own wishes and I was conditioned to think I only got love and validation if i was a “good girl”. The same concept is happening to toshiki except he’s hearing it twice AND the unspoken thought out consequences of NOT being a “good boy”. It’s not his fault. Either you become exhausted and burnt out or you become jaded. He became burnt out and jaded.
Just an observation but how come always in mind reader characters that aren’t usually associated with intellectual personas they’re always so pessimistic? Like I get why they feel so disingenuous with people but like if u have had that ability for so long, you shouldn’t really internalize every single thought a person has that you’ve seen or heard. Thoughts like that don’t really reflect the true person unless they’re like plotting something. Like you could hear a thought that “ah this is so annoying to me right now” but it wasn’t particularly directed at you just the experience or task they’re having right now. Ignore this this is just word vomit.