Why TV stars shouldn't be in musicals!

This has been bugging me for quite a while now, mainly because of television actors & 'celebrities' think they can just parade & strut around a stage terribly singing, calling themselves ' West End/Broadway stars!' I even detest it when theatre stars wind up becoming television & film stars with fans neglecting their origins of acting! Look at Lea Michele! She started theatre when she was 8 in Les Miserables & was the original Wendla in Spring Awakening! Now all she's known for is being Rachel in Glee & being in that rubbish New Year's Day film!

Also, I think it's mainly for stupid new theatre fans just to pay for expensive tickets just to see their favourite star, like Amanda Holden when she was Fiona in Shrek the Musical! I went to see her in the opening preview & I couldn't believe how rubbish she was at singing! Also, I hated how people payed more attention to her at the stage door, just because of her Britain's Got Talent fame, compared to Nigel Harman, who has been in the West End before, & Nigel Lindsay, sweating after taking off his prosthetics bless him, who was the title character for God's sake!

Also, I think it's just for advertisement, like with Legally Blonde with Sheridan Smith & Denise Van Outen & now all of a sudden, Sheridan Smith is in everything! They didn't even need to advertise Sierra Boggess when she joined the London cast of Les Miserables and I prefer her to all them idiots!
One other thing I detest is the use of TV talent shows to find new actors for roles in revivals of shows! Look at How Do You Solve a Problem Like Maria when Connie Fisher won. What happened to her? What happened to the rest? Siobhan Dillon became Vivienne in Legally Blonde & Molly in Ghost the Musical! Jodie Prenger was told she was too fat to play Nancy in I'd Do Anything & she won! She even won the Biggest Loser beforehand! Rachel Tucker ended up becoming London's longest running Elphaba in Wicked & Samantha Barks ended up as Eponine in the film version of Les Miserables, who she played in London.
She even admitted afterwards she was glad she didn't win because it hasn't affected her career! Also, that new Jesus Christ Superstar tour has been given negative reviews & features a former Spice Girls singer, a comedian who wrote the Olivier award-winning Matilda & radio host Chris Moyles!

The only exception I have with this is Matt Lucas in the Les Miserables 25th Anniversary Concert because he could actually sing & is a very funny comedian & thus suits the role of Thenardier! However, when that scrawny & annoying Nick Jonas came on my screen next to theatre hunk Ramin Karimloo I was like 'GET THE FUCK OFF MY SCREEN BECAUSE YOU SHOULDN'T BE ANYWHERE NEAR THIS SHOW OR IT'S AMAZEMENT!'