okay.
We sell stones. sign for arguments sake and sign 3 top players with the money. are we weaker?
Nope. But you might as well say "we swap Stones for Messi are we weaker?" Of course you can frame the argument in a fashion where you win. But the thing you are proposing is
incredibly unlikely. I assume we try to buy top players every single time we buy someone. How many turn out that way? Although it depends on your definition of "top" but it seems very unlikely ... like this ...
or better yet barca sell Messi right now and look to invest the money. They sign stones, a Ronaldo in waiting, a Cristiano Ronaldo in waiting, pogba, De gea.
yes right this minute they are weaker, but in 2 years they are even better than what they are now. so the money would be invested into a better future for them. They lose one top class player who improves a rival but in a couple of years their first 11 is better than anyone else's.
is that not improving?
Where on earth are they finding these two Ronaldos?
First off you have to figure out the delta between what Barca can do now
with Messi v. what selling Messi would allow them to do that could
not already do with Messi.
Why can't they buy Ronaldo in waiting now and keep Messi (temporary transfer embargos aside)? They can.
There are a limited quantity of Ronaldos (even accounting for the two different famous ones). There are a limited quantity of starting spots for Barca.
They can afford to buy more players than they do buy already. They just can't buy everyone. Money is not the limiting factor for them. It's the available talent better than existing players (very limited) and their ability to attract that talent (because even with a name like Barca if you'll never play you'd rather go to another elite club).
Money isn't their issue. I think Barca can easily afford most of the potential Ronaldos already without selling Messi.
Few pages back you said something like "well of course he's worth more to Barca than any team in the world would actually pay but that doesn't mean they wouldn't sell him" (for an amount nobody would actually give them). That's my issue. This is all hypothetical. When people say "well every player has a price" they don't mean "if someone utterly mental shows up and spends way more money on a player than anyone on earth would deem remotely reasonable."
If you saw a list of the most expensive cars in the world and they were all theoretical prices (well someone might pay $175 million for my Ford Escort so it's number one!) you wouldn't be happy.
I'm arguing that a player can be worth more to a team than the money it would cost to buy him. So not every player has a price. If you admit nobody would pay Barca what they would need to sell then not every player has a price.