First, “forcing” is not the right word. Butch lesbians aren’t being kidnapped and taken to gender clinics in the dead of night against their will. But “pressure” to transition certainly is a major thing. Just ask the many butch or “gender nonconforming” lesbians on here if they have felt and/or succumbed to that pressure.
And yeah, I know, commenters like you are fond of drawing those bright lines between gender identity and sexual preference. All those women who were lesbians before transition were never **really** lesbians. Right.