Smith's only options to make the big club would be someone suffering a season-ending injury or if the team was absolutely terrible and was trying to get asses in the seats for the season.
Smith just turned 22 2 weeks ago. He's played 5 games at the AA level and zero at AAA. I love that he's crushing it, but he's mostly crushing it against guys that he'll be seeing in AA later this year. If he goes to Corpus and tears it up, move him up to Sugarland in May or June. If he does it there, then he's 30 minutes away (or 4 hours during rush hour) when someone goes on the DL.
Rushing him up just doesn't make sense barring those first two circumstances. The Orioles rushed Jackson Holliday up last year when he was only 20 because he was having a solid first half in AAA, and paid for it with him looking completely overmatched at the plate. The guy's "best" month was hitting .219 in August.
Looking back at Yordan's call-up in 2019 when he was the same age Smith is now, Yordan had played 250 games in the minors and 74 more in foreign leagues. In 2018, he was at Corpus for half a season and killed it, then went to AAA Fresno and was good but not great. He started 2019 in Round Rock and was hitting .343 with a 1.185 OPS through 56 games when he got called up.
That's the trajectory that Smith should be on. If he crushes in in AA or AAA to start this year, move him up to the next level after 60 games.