My home builder just poured a footer and is drilling holes for vertical rebar to support a block wall which will be the foundation for the garage slab with 2' of gravel under it. I asked why he didn't simply put the rebar into the wet cement when the footer was poured to save me the expense of hammer drilling and epoxying into the hardened footer. He said the rebar "would not set correctly" if put into wet cement. This does not sound right to me. What do you think?