It becomes a problem when the sexual orientation overshadows the music, which is what Lambert's career has recently become.
The publicity surrounding his last album became off-putting to a high degree. Blogs proclaiming to support the album for his sexual orientation to send a message; and Lambert himself giving an admittedly sound observation of the challenges out gay men in the industry face, yet the statement read like a subtle attempt to dismiss his detractors whom get catty with him because of a DROUGHT in QUALITY.
His lukewarm career is a testament to the fact that, before any ADJECTIVE can be bestowed upon an artist, the NOUN must hold up on its own; Lambert failed to PASS that test, so now he's attempting to TRESPASS into consumers' wallets on a sparkly rainbow boat.