Is it possible for historical writing to be free from perspective?
In most cases, no it isn’t. It is possible to make the argument that it is possible, usually pertaining to frequently documented numerical/quantitative or standalone information, with information such has “George Washington was the first president of the United States”. However, large-scale events with many people involved are more difficult to accurately describe in their entirety. An example could be the World Wars- with so many countries involved, so many political and civilian stakeholders, it’s hard to objectively capture every single occurrence during those years.
Is it a problem that it might not be free from perspective?
Not necessarily either. A lot of the purpose of history as a domain of study is that it captures the ideologies and schools of thought of different stakeholders depending on the event.