“No conservative or reform convert intends to accept the 613 mitzvos, thus they are all invalid. No conservative and reform convert intends to keep Shabbos (i.e. not drive, no making fires, opening electricity, etc.) or keep the full taharas hamishpacha.”
This is absolutely not true. I know many heterodox converts who wanted to keep the 613 mitzvot and therefore later had orthodox convertions.