There is no way the proposed trade is anywhere near good enough value for Giannis. I don't care if you add 10 unprotected 1st's, not enough value. It will take Tatum, maybe even Tatum and Brown to acquire Giannis from Milwaukee.
That's absolutely ridiculous. You only have to look at the recent trade packages for MVP candidates like Anthony Davis, Kawhi and Paul George to realise that
To be fair only Davis is on Giannis' level, and didn't the Lakers trade Ingram, Lonzo, Hart and 5-7 1sts for him?
Ingram at that stage was worse than Brown is now, Lonzo is and was worse than Smart, Hart didn't have much value as an inefficient mediocre defending 3&D prospect, and those picks are LA's 2021 1st, LA's 2023 1st and LA's 2024 1st. So only 3 first round picks and worse players than we could offer.
An offer of Brown/Tatum, Smart, Langford, #14 and one future 1st blows that offer out of the water.
It was 4, Ingram, Ball, Hart, 2021, 2023 (swap rights), 2024 or 2025. You are forgetting about the 4th pick in the draft. Ball has more value than Smart, especially to a rebuilding team.
And Giannis is better than Davis. After all he is the 2 time reigning league MVP and the defending DPOY. Last time I checked Davis hasn't won any of those awards. Giannis has also missed far fewer games and had far more team success than Davis had in NO (further suggesting Giannis is more valuable a player as a centerpiece).
Boston isn't acquiring Giannis without Tatum because Brown and a bunch of late first and role players isn't enough value and will be beaten by other offers from teams that have much better draft capital or more high level prospects. If Giannis becomes available, it will take Tatum and other pieces for Boston to acquire him.
EDIT: And let's think about potential trade packages for Giannis. I mean there is the 2nd pick in the draft on a team that has some other solid assets and that would still be very good after acquiring Giannis (Thompson and 2 for Giannis makes sense on some level for both teams). What about Jamal Murray and Michael Porter for Giannis? Or 4, Carter, Markkanen, LaVine, and a bunch of a future 1st's (and then have max cap room to bring in whoever Giannis wants). Philly could give up Simmons (and players like Thybulle, Smith, and future picks), that would be an interesting trade for both teams. A trade centered around Siakam or Bam could also work. If Giannis truly becomes available, there will be bidding wars. Boston isn't acquiring him without Tatum.