Yes, it is absolutely necessary, for the same reason that special legislation must be avoided. Employers need to be incentivized to resolve issues at the bargaining table. If special legislation or strikebreakers are used, it prevents workers from trying to resolve problems at the bargaining table. It undermines the power relationship at the bargaining table.
If we want to have a healthy labour relations system and if we want to respect the right to negotiate and the right to strike, we must avoid the use of strikebreakers and special legislation.