That's a verrrry broad generalisation. I'm sure there are plenty of examples that support that proposition, but I can probably come up with just as many that contradict it. Every vintage there are reds made to drink soonish and those made to cellar, the latter in a minority these days. Yes, there are often particular vintage characteristics relating to development profile (sometimes only valid within a particular region), but having bought and cellared red wines for nearly 50 years now, I'm reasonably confident in assessing how a young wine will develop over say 10 years.
If a wine is out of balance and hard-edged (rather than just big and maybe firmly tannic/oaky) it seldom comes into balance down the track.
I would much prefer the Kalleske Greenock Shiraz 2016 compared to the Lear 2016, happy to pay the price difference. Or even the $18 Allegiance Artisan Barossa Shiraz, now that is one seriously delicious 2016 Shiraz at a good price.