What does "strong" mean in this case? The health care department issues statements in Norway that politicians were not acting on their recommendations, but rather that they were making "political decisions". I guess they want their population to look at them as strong leaders. We should not confuse that kind of strong, with measures that elicit a strong decline in cases. We only need the latter right now.
Same thing with Denmark. Their Ministry of Health said that closing the borders was a political decision and not based on public health.
Sweden has stayed consistent with what experts have been saying. There's no use in closing the borders when the virus is already in the country.
Same thing with outlawing movement in and out of Stockholm. There's already a very clear recommendation and instruction to avoid travel within the country to avoid spreading the virus. There's no real way of enforcing a full quarantine unless you divert police officers who could be doing other things, or the military which we are reluctant to do (see Ådalen 1931, which is a reason why you don't want armed military to interact with citizens).
>Sweden has stayed consistent with what experts have been saying
Letting up to 499 people gather freely is not what experts will tell you is the way to stop this, so clearly they have not. If anything Sweden is among those that have listened least to medical experts. Norway and Denmark is following the advice much closer, closing borders or not.
The maximum number of invidivuals allowed in public gatherings has been lowered to 50, after being requested to do so by the Swedish public health agency.