It is really not safe to make broad generalities like this as it will depend on the shrub and its normal growth habit. Some will not respond favorably to the type of pruning described while others will take it in stride.

Trying to turn a shrub into something it is not does not always produce a successful outcome :-) Some types of shrubs lend themselves easily to be standardized or trained into a tree-.like form and can support that aesthetic but others, especially caning shrubs, are not improved by this method. And attempting to keep them to a single stem or trunk will be a exercise in frustration.

It should also be pointed out that this is rarely a once and done situation with the training and pruning necessary to turn a suitable shrub into a standard taking place over a span of several years.

regarding to pruning young shrubs

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how young.. and are they fully established ...

a mature plant.. with a mature root mass should have a god given annual growth rater.. and pruning should not change it ... ergo.. the answer should be no ... as per your title...

ken

ps: you should not really prune young shrubs.. until the have established themselves.. which basically means.. they have a complete and proper root mass..no longer affected by the transplanting ...