I get it she feels hopeless and she shouldn't be treated that way by his mom but like she ...

She's just being realistic. His mom is right. She was a hindrance to him when it comes to social status and she also has disability. Luckily, the ML is straight forward and doing the work for her. We cant blame her to be so insecure because even her own mom doesnt like her.

Long distance is only a struggle between normal people tbh, I feel like if you’re rich then it’s not because he literally has the money to see her and would try to work it out if he really likes her

You’re right but if you truly love yourself then you wouldn’t deny yourself happiness mc, especially since he has been interested in her way before she was in him. He wants her even more so why not just be with him. The mom was clearly coming from a place of judgement and not real concern

exactly what I was thinking like he could also just expand the company to US or wtv bullshittery and while I do agree socially she's different but like he's rich. he CAN abuse that power. not saying girlie can't be insecure but I want her to at least try one last time, I mean you're leaving your whole life the least you could do is put it in one last effort or push.

Expanding is out of touch and it will make some time. Also, Sahee is also trying by accepting Taejoon in her life but she knew how to draw the line. Taejoon is aware what she's scared of. He's the one doing more effort since he is more powerful than Sahee. He's not hiding their relationship but she wanted it that way.