Yes, compared to genuinely elite strikers he is a relatively average player.
A third of all his goals for Brentford have been penalties. The 14 goal non-penalty tally is the same as Calumn Wilson's and one more that Ollie Watkin's this season. Two other above-average PL strikers. Except Wilson wracked up his goals in much fewer minutes, while Watkins has at least returned at that level in the PL in more than one season. Meanwhile players like Patrick Bamford and Tammy Abraham have all scored more than that in previous seasons. This isn't in any way a special player.
It's a good player, someone who wouldn't "solve our CF issues for a long time" but would fill in until we find the actual top class striker who could. But in order to do that, he has to not be banned for half a season.
And even if he was some potentially elite CF, you still wouldn't sign him at the start of a half-season ban. You would sign him when he's actually available to play.