my plumber questions the longevity and integrity of a deck mounted roman tub filler with a hand held faucet (Grohe 3 holes total) in an acrylic tub. The tub is a neptune wind

here is the link to the tub: http://www.produitsneptune.com/en/pr...rfamily_id=192

Here is the link to the faucet:

http://www.amazon.com/gp/product/B00...TCKY3VZWXSN2XB

he is suggesting a wall filler instead. Are his concerns valid?

Thanks in advance for your answers!