1. You cant guarantee they'll be good enough in 3 years time - All the other top clubs do it consistently. Every time they sign a player from these level of clubs you know they'll be successes and they are 90% of the time.
2. The fans wont accept good players on bargain. Cue glazer cnut penny pinching - Simply not true. Most fans are eager for United to move away from marquee signings and sign players with more hunger. You're acting like i mean players from Celtic.
3. Our aim is 4th or above. Buying good players that are good but not good enough for 4th is moot. - The players would be good enough. Just like when United signed players from Mexico, Uruguay and Russia for peanuts and won the league with them, because the scouting then was much better. These players get identified regularly enough by the clubs above us. We are rich and appealing enough to find them ourselves. Diaz cost Liverpool in January for under £40m. That should be the range, 30-40m. Can easily sign a title winning squad with players in that range, let alone 4th.
4. They might want and we can get them quick. But if our top priority said yes we'd be left with surplus players bought out of panic - Silly point. Again, United when they were successful and top clubs now don't necessarily sign the best players from other top clubs. They sign the best players to fill their system. Plenty of these around. Ten Hag did it with Ajax and turned them into one of the best CL teams.
5. They'd want upgrade and not sideways contract. - No problem with that. Better than paying Pogba 300k to fly to dubai every 2 months.
6. Actual good players with talent wont want to join us at this rate and rightly so if they value their career. We're career killers at the moment. - Another ridiculous point. We're a career killer mainly because we're signing players who don't want to join. Liverpool and Chelsea especially have had slumps and 6th and lower finishes in the last 10 years and it hasn't stopped them attracting players. United are very attractive. If they went for Diaz last summer for example, they'd have got him. But we don't identify these talents.